380 Chapter 10: X.25/Frame Relay Topologies
Answer to Scenario 2
1
Figure 10-29 is one possible solution for scenario 2. There are other ways of meeting the
company's requirements. This is only a recommended solution that meets the
requirements placed on the CCDP.
Figure 10-29
Suggested Solution for Scenario 2
The requirements for any-to-any connectivity for voice purposes can be met with a full-
mesh solution. This solution has a direct PVC from every site to every site.
WARNING
These PVCs are for voice only! In most designs like this, separate PVCs are used for data,
which could double your cost.
If you use the full-mesh formula for calculating how many links are in the network, the
total is 6.
Each link has a CIR of 64 K, which guarantees that at least 64 K of bandwidth will be
available for the voice calls.
Central site
Cloud
Remote Site 1
Remote Site 2
Remote Site 3
All links have a CIR of
64k
V
V
V
V
Interface serial0.401 point-to-point
Description to Router 1
Frame Relay Interface DLCI 401
Interface serial0.402 point-to-point
Description to Router 2
Frame Relay Interface DLCI 402
CH10.fm Page 380 Wednesday, August 22, 2001 3:34 PM